[#114] Add yaml configuration controllers

Signed-off-by: Andrey Berezin <a.berezin@yadro.com>

src/frostfs_testlib/storage/configuration/service_configuration.py

@@ -0,0 +1,67 @@
+import os
+import re
+from typing import Any
+
+import yaml
+
+from frostfs_testlib.reporter import get_reporter
+from frostfs_testlib.shell.interfaces import CommandOptions
+from frostfs_testlib.storage.configuration.interfaces import ServiceConfigurationYml
+from frostfs_testlib.storage.dataclasses.node_base import ServiceClass
+
+reporter = get_reporter()
+
+
+class ServiceConfiguration(ServiceConfigurationYml):
+    def __init__(self, service: "ServiceClass") -> None:
+        self.service = service
+        self.shell = self.service.host.get_shell()
+        self.confd_path = os.path.join(self.service.config_dir, "conf.d")
+        self.custom_file = os.path.join(self.confd_path, "99_changes.yml")
+
+    def _path_exists(self, path: str) -> bool:
+        return not self.shell.exec(f"test -e {path}", options=CommandOptions(check=False)).return_code
+
+    def _get_data_from_file(self, path: str) -> dict:
+        content = self.shell.exec(f"cat {path}").stdout
+        data = yaml.safe_load(content)
+        return data
+
+    def get(self, key: str) -> str:
+        with reporter.step(f"Get {key} configuration value for {self.service}"):
+            config_files = [self.service.main_config_path]
+
+            if self._path_exists(self.confd_path):
+                files = self.shell.exec(f"find {self.confd_path} -type f").stdout.strip().split()
+                # Sorting files in backwards order from latest to first one
+                config_files.extend(sorted(files, key=lambda x: -int(re.findall("^\d+", os.path.basename(x))[0])))
+
+            result = None
+            for file in files:
+                data = self._get_data_from_file(file)
+                result = self._find_option(key, data)
+                if result is not None:
+                    break
+
+        return result
+
+    def set(self, values: dict[str, Any]):
+        with reporter.step(f"Change configuration for {self.service}"):
+            if not self._path_exists(self.confd_path):
+                self.shell.exec(f"mkdir {self.confd_path}")
+
+            if self._path_exists(self.custom_file):
+                data = self._get_data_from_file(self.custom_file)
+            else:
+                data = {}
+
+            for key, value in values.items():
+                self._set_option(key, value, data)
+
+            content = yaml.dump(data)
+            self.shell.exec(f"echo '{content}' | sudo tee {self.custom_file}")
+            self.shell.exec(f"chmod 777 {self.custom_file}")
+
+    def revert(self):
+        with reporter.step(f"Revert changed options for {self.service}"):
+            self.shell.exec(f"rm -rf {self.custom_file}")